Question

what part of mechanical digestion refers to strong waves that quickly force the contents from the colon toward the rectum? a.) valsalva maneuver b.) haustrel contractions c.) mass movements d.) peristalsis

Explanation:

• Valsalva maneuver: Involves forced exhalation against a closed airway, not related to colon - rectum movement.
• Haustral contractions: Slow segmenting movements in the colon for mixing, not for rapid propulsion.
• Mass movements: Strong propulsive waves in the colon that quickly force contents toward the rectum.
• Peristalsis: More common in other parts of the digestive tract (like esophagus) with slower, rhythmic waves compared to the strong waves described here for colon - rectum movement.

Answer:

C. Mass movements